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WorksheetsChemical Reactions
Total questions: 10
Worksheet time: 5mins
Which is an example of a chemical change?
Burning wood
Cooking food
Rust on a car
All of the above
If you start a chemical reactions with 5 atoms of helium, how many atoms will you have after?
4 atoms
1 atom
10 atoms
5 atoms
Which of the following are properties of matter?
Magnetism
Odor
Color
All the above
Which of the following help a chemical reaction to happen faster?
Molecule
Catalyst
Atom
Density
Is TNT exploding a physical or a chemical change?
Physical
Chemical
Both physical and chemical
Neither physical nor chemical
What kind of scientist forms new chemicals by studying chemical reactions?
Chemical engineer
Pharmacist
Materials scientist
Medical doctor
Which observation(s) might be used as evidence that a chemical reaction occurred?
Color change
Properties change
Odor change
All the above
______ is (are) made of more than one atom.
A molecule
Neutrons
Protons
An element
______ result(s) in no new substances.
A physical change
Physical and chemical changes
A chemical change
None of the above
Which is an example of a physical change?
Burning wood
Rust on a car
Freezing water
Cooking food
